The Cannabis Family Tree – an introduction to phylogenetics

The task of categorizing and cataloguing the billions of plant species that have existed on our planet since the dawn of life is a huge and vastly complex one. Prior to our development of genetic testing, classification on the basis of perceived similarity was the only way to assign a plant to its correct taxon. Now that we have developed the study of phylogenetics (evolutionary relationships between groups of organisms), we have some basis for classifying plants according to their genetic similarities, but that does not provide a problem-free approach to such a complex task.

The complex and confusing world of plant taxonomy

The Rosales order belongs to the informal subclass (or superorder) Rosanae (or Rosidae), a huge clade that comprises almost one quarter of all flowering plants. These “rosids” belong to the Magnoliopsida or Eudicot class, which is a member of the Angiospermae infradivision, which in turn belongs to...

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